Brocade Mobility RFS7000-GR Controller System Reference Guide (Supporting software release 4.1.0.0-040GR and later) - Manual (Page 27)

Brocade Mobility RFS7000-GR Controller System Reference Guide 13
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Software overview
1
802.11e QoS
802.11e enables real-time audio and video streams to be assigned a higher priority over data
traffic. The switch supports the following 802.11e features:
• Basic WMM
• WMM Linked to 802.1p Priorities
• WMM Linked to DSCP Priorities
• Fully Configurable WMM
• Admission Control
• Unscheduled-APSD
• TSPEC Negotiation
• Block ACKQBSS Beacon Element
802.1p support
802.1p is a standard for providing QoS in 802-based networks. 802.1p uses three bits to allow
switches to re-order packets based on priority level.
Voice QoS
When switch resources are shared between a Voice over IP (VoIP) conversation and a file transfer,
bandwidth is normally exploited by the file transfer, thus reducing the quality of the conversation or
even causing it to disconnect. With QoS, a VoIP conversation (a real-time session), receives priority,
maintaining a high level of voice quality. Voice QoS ensures:
• Strict Priority
• Spectralink Prioritization
• VOIP Prioritization (IP ToS Field)
• Multicast Prioritization
Data QoS
The switch supports the following data QoS techniques:
• Egress Prioritization by WLAN
• Egress Prioritization by ACL
DCSCP to AC mapping
The switch provides arbitrary mapping between Differentiated Services Code Point (DCSCP) values
and WMM Access Categories. This mapping can be set manually.
Wireless Layer 2 switching
The switch supports the following layer 2 wireless switching techniques:
• WLAN to VLAN
• MU User to VLAN
• WLAN to GRE
Automatic channel selection
Automatic channel selection works sequentially as follows: